neck
When water is drawn from a 5 gallon water bottle, air needs to enter to replace the space occupied by the water that is being dispensed. This causes a bubble of air to burp as the pressure inside the bottle equalizes. It's a natural process that helps with the flow of water.
Not really, for the volume of the bubble is air, not a material of different refractive index. But if you were to fill a transparent balloon with water, say, you would have a lens. Try it with a clear soda bottle.
Get a watter bottle. Dring a large gulp. Turn it upside down add that bubble is air.
1) Weight in the downward direction 2) Upthrust due to the displaced liquid
advantagaes of bubble sensing
If the bubble is exactly centered the level is horizontal (or vertical if it is one of those)
the air condenses and pulls the bottle in on itself
That direction is level when bubble is centered
niall
If the fluid is not turbulent, then the only forces acting on the bubble are vertical ... the downward gravitational force and the upward buoyant force. Whichever force is the stronger one defines the direction in which the bubble must move.
$125.00
It is called a bubble wand.
The level holds a tube of oil with 2 marks set 5millemetres apart at its centre. a bubble of air will travel along the tube in the opposite direction to the angle the level is held at. When the bubble sits between the 2 lines it indicated that level is either horizontal or if the tube is set so it can indicate a vertical then it shows that the level is vertical . Used by builders in the main it helps them ensure that items are true vertical ( a wall for instance) or true horizontal (a kitchen work top for instance)
blue bottle jellyfish or portugeuse man of war
By shaking you have created air bubble which expands the molecules inside the bottle.
When water is drawn from a 5 gallon water bottle, air needs to enter to replace the space occupied by the water that is being dispensed. This causes a bubble of air to burp as the pressure inside the bottle equalizes. It's a natural process that helps with the flow of water.
If you mean a 'spirit level' then when the line is in the center of the bubble then the object being measured is horizontal to the ground.